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HomeWeather news → National Weather Service Issues Extreme Heat Warning for Parts of Nevada, California, and Arizona
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National Weather Service Issues Extreme Heat Warning for Parts of Nevada, California, and Arizona

September 8, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Las Vegas has issued an Extreme Heat Warning for portions of southern Nevada, southeast California, and northwest Arizona. The warning is active from 10:00 AM to 8:00 PM PDT / MST on Thursday, September 10.

Dangerously hot late-season conditions are expected across the region. High temperatures are forecasted to reach between 112 and 116 degrees Fahrenheit in Death Valley and the Colorado River Valley. Temperatures in the Las Vegas Valley, Moapa Valley, and Pahrump Valley are expected to reach between 105 and 110 degrees Fahrenheit.

The warning covers multiple locations, including Death Valley National Park, the Cadiz Basin, and the San Bernardino County-Upper Colorado River Valley in California. In Arizona, impacted areas include Lake Havasu, Fort Mohave, the Northwest Deserts, and the Arizona sides of Lake Mead and Lake Mohave. In Nevada, affected zones include Northeast Clark County, Western Clark and Southern Nye County, the Las Vegas Valley, and the Nevada sides of Lake Mead and Lake Mohave.

The National Weather Service warns that extreme heat significantly increases the risk of heat-related illnesses. Residents and visitors in the affected regions are advised to monitor local forecast updates and take appropriate precautions during the high-temperature event.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids, stay in air-conditioned rooms, and stay out of the sun.
• Never leave young children or pets inside unattended vehicles, as car interiors reach lethal temperatures rapidly.
• Limit strenuous outdoor activities to early morning or evening hours and schedule frequent rest breaks in shaded or air-conditioned environments.
📊 The numbers, from wweather1 data
Las Vegas: now +24°, Clear.
That is 6° above the September climate norm.
The record for this date is +42° (2021).
Three-day forecast: 8 September: +40°/+23° · 9 September: +41°/+24° · 10 September: +42°/+34°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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